Shoe upper



FIG. 1 is a front perspective view of a shoe upper showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear side view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is a second side view thereof; and,

FIG. 6 is a top view thereof. 

The ornamental design for a shoe upper, as shown and described. 